loadsmith-core 0.2.0

//! Core types, traits, and errors for the loadsmith mod-manager library.
//!
//! This is an internal crate of the [`loadsmith`] workspace. Most consumers
//! should depend on the `loadsmith` facade crate instead of using this
//! crate directly.

use std::{fmt::Display, str::FromStr};

use camino::Utf8PathBuf;
use chrono::{DateTime, Utc};
use serde::{Deserialize, Serialize};

mod checksum;
mod error;
mod source;

pub use checksum::{Checksum, ChecksumAlgorithm};
pub use error::{Error, Result};
pub use semver::{Version, VersionReq};
pub use source::FileUrl;

#[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize, Deserialize, PartialOrd, Ord)]
pub struct PackageId(String);

impl PackageId {
    pub fn new(id: impl Into<String>) -> Self {
        Self(id.into())
    }

    pub fn as_str(&self) -> &str {
        &self.0
    }

    pub fn into_string(self) -> String {
        self.0
    }
}

impl AsRef<str> for PackageId {
    fn as_ref(&self) -> &str {
        self.as_str()
    }
}

impl From<String> for PackageId {
    fn from(id: String) -> Self {
        Self(id)
    }
}

impl From<&str> for PackageId {
    fn from(id: &str) -> Self {
        id.to_string().into()
    }
}

impl Display for PackageId {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "{}", self.0)
    }
}

#[derive(Debug, Clone, PartialEq, Eq, Hash, Serialize, Deserialize, PartialOrd, Ord)]
#[serde(into = "String", try_from = "&str")]
pub struct PackageRef {
    id: PackageId,
    version: Version,
}

impl PackageRef {
    pub fn new(id: impl Into<PackageId>, version: impl Into<Version>) -> Self {
        Self {
            id: id.into(),
            version: version.into(),
        }
    }

    pub fn id(&self) -> &PackageId {
        &self.id
    }

    pub fn version(&self) -> &Version {
        &self.version
    }

    pub fn into_id(self) -> PackageId {
        self.id
    }

    pub fn into_version(self) -> Version {
        self.version
    }

    pub fn into_split(self) -> (PackageId, Version) {
        (self.id, self.version)
    }
}

impl Display for PackageRef {
    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
        write!(f, "{}@{}", self.id, self.version)
    }
}

impl FromStr for PackageRef {
    type Err = Error;

    fn from_str(s: &str) -> Result<Self> {
        let mut split = s.split('@');

        let id = split.next().ok_or(Error::InvalidPackageRefFormat)?;
        let version = split.next().ok_or(Error::InvalidPackageRefFormat)?;

        if split.next().is_some() {
            return Err(Error::InvalidPackageRefFormat);
        }

        let id = PackageId::new(id);
        let version = Version::from_str(version)?;

        Ok(Self::new(id, version))
    }
}

impl From<PackageRef> for String {
    fn from(package_ref: PackageRef) -> Self {
        package_ref.to_string()
    }
}

impl TryFrom<&str> for PackageRef {
    type Error = Error;

    fn try_from(s: &str) -> Result<Self> {
        s.parse()
    }
}

#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub struct InstalledPackage {
    #[serde(rename = "package")]
    ref_: PackageRef,
    #[serde(default, skip_serializing_if = "Option::is_none")]
    checksum: Option<Checksum>,
    date: DateTime<Utc>,
    files: Vec<InstalledFile>,
}

#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub struct InstalledFile {
    relative_path: Utf8PathBuf,
    linked: bool,
}

impl InstalledPackage {
    pub fn now(ref_: PackageRef, files: Vec<InstalledFile>, checksum: Option<Checksum>) -> Self {
        Self {
            ref_,
            files,
            date: Utc::now(),
            checksum,
        }
    }

    pub fn ref_(&self) -> &PackageRef {
        &self.ref_
    }

    pub fn files(&self) -> &[InstalledFile] {
        &self.files
    }

    pub fn files_mut(&mut self) -> &mut Vec<InstalledFile> {
        &mut self.files
    }

    pub fn date(&self) -> &DateTime<Utc> {
        &self.date
    }

    pub fn checksum(&self) -> Option<&Checksum> {
        self.checksum.as_ref()
    }
}

impl InstalledFile {
    pub fn new(relative_path: impl Into<Utf8PathBuf>, linked: bool) -> Self {
        Self {
            relative_path: relative_path.into(),
            linked,
        }
    }

    pub fn relative_path(&self) -> &Utf8PathBuf {
        &self.relative_path
    }

    pub fn linked(&self) -> bool {
        self.linked
    }
}

#[derive(Debug, Clone, PartialEq, Eq, Serialize, Deserialize)]
pub struct Dependency {
    pub id: PackageId,
    pub version_req: VersionReq,
    pub source: String,
    #[serde(default, skip_serializing_if = "Option::is_none")]
    pub registry_metadata: Option<serde_json::Value>,
}

impl Dependency {
    pub fn new(
        id: impl Into<PackageId>,
        version_req: impl Into<VersionReq>,
        source: impl Into<String>,
    ) -> Self {
        Self {
            id: id.into(),
            version_req: version_req.into(),
            source: source.into(),
            registry_metadata: None,
        }
    }

    pub fn with_registry_metadata(mut self, metadata: impl Into<serde_json::Value>) -> Self {
        self.registry_metadata = Some(metadata.into());
        self
    }
}

#[cfg(test)]
mod tests {
    use super::*;

    use std::assert_matches;

    #[test]
    fn package_ref_from_str() {
        let package_ref: PackageRef = "author-name@1.2.3"
            .parse()
            .expect("failed to parse package ref");
        assert_eq!(package_ref.id.as_str(), "author-name");
        assert_eq!(package_ref.version, Version::new(1, 2, 3));
    }

    #[test]
    fn package_ref_from_str_two_ats() {
        let res: Result<PackageRef> = "author-name@1.2.3@4.5.6".parse();
        assert_matches!(res, Err(Error::InvalidPackageRefFormat));
    }

    #[test]
    fn package_ref_from_str_invalid() {
        let res: Result<PackageRef> = "author-name-1.2.3".parse();
        assert_matches!(res, Err(Error::InvalidPackageRefFormat));
    }

    #[test]
    fn package_id_from_str() {
        let package_id: PackageId = PackageId::new("author-name");
        assert_eq!(package_id.as_str(), "author-name");
    }
}